Difference Between Edit And Display Method in Ax

Display Method:

The display method means that the method’s return value is being displayed on a form or a report. This value is fixed and cannot be edited on the form or report. If a user only wants to display the value display method is used.

Edit Method: 

Edit methods are basically the same as display methods. Edit indicates that the method’s return type is to be used to provide information for a field that is used in a form. The value in the field can be altered and that users can also write data to the fields.